A lightweight bout between Gleison Tibau (26-9 MMA, 11-7 UFC) and John Cholish (8-2 MMA, 1-0 UFC) is the latest addition to May's UFC on FX 8 lineup.

A source close to the event today confirmed the matchup withMMAjunkie.com(www.mmajunkie.com).MMAFighting.com initially reported it. UFC officials made subsequently made a formal announcement.

UFC on FX 8 takes place May 18 at Arena Jaragua in Jaragua do Sul, Santa Catarina, Brazil. The event's main card airs live on FX following prelims on FUEL TV and Facebook.

Tibau vs. Cholish likely will be part of the prelims.

Tibau, who fights in his home country, had won three straight fights before a recent 1-2 skid, which included decision losses to Khabib Nurmagomedov and Evan Dunham, as well as a decision victory over Francisco Trinaldo. The 29-year-old fights for the 19th time with the UFC, where he first debuted back in 2006.

Cholish looks to get back in the win column following a May 2012 loss to Danny Castillo, which snapped an eight-fight win streak. The 29-year-old New Yorker made his UFC debut in December 2011 with a TKO win over Mitch Clarke, but he's fought just once since then due to injuries.

A lightweight matchup between Gleison Tibau (25-7) and Khabib Nurmagomedov (17-0) is the latest addition to July's UFC 148 event.

An American Top Team fighter, Tibau is currently enjoying his best UFC run with three-straight victories. The run includes wins over Rafael dos Anjos, Rafaello Oliviera and Kurt Pellegrino.  Tibau, in fact, is actually 5-1 in his past six fights, with the lone loss coming to perennial contender Jim Miller.

The undefeated Nurmagomedov gets a stiff test in just his second octagon effort. The Russian debuted in January, earning an impressive submission win over Kamal Shalorus.  The 23-year-old prospect made his professional debut in September 2008 and has remained perfect since.

UFC 148 takes place July 7 at MGM Grand Garden Arena in Las Vegas.

Weigh-in results for UFC 139, which takes place Saturday at HP Pavilion in San Jose, Calif.:

MAIN CARD (Pay-Per-View)

• Dan Henderson (203) vs. Mauricio "Shogun" Rua (205)
• Cung Le (185) vs. Wanderlei Silva (185)
• Brian Bowles (136) vs. Urijah Faber (136)
• Rick Story (170.5) vs. Martin Kampmann (170.5)
• Kyle Kingsbury (205) vs. Stephan Bonnar (205)

TELEVISED PRELIMS (Spike TV)

• Jason Brilz (204) vs. Ryan Bader (205)
• Alex Soto (135) vs. Michael McDonald (136)

ONLINE FIGHTS (Facebook)

• Chris Weidman (185.5) vs. Tom Lawlor (185)
• Rafael Dos Anjos (155.5) vs. Gleison Tibau (155)
• Nick Pace (141*) vs. Miguel Torres (137)
• Seth Baczynski (171) vs. Matt Brown (171)
• Danny Castillo (155) vs. Shamar Bailey (158*)

* Pace and Bailey will be fined 20 percent of their purses and their fights will go on as scheduled

As expected, UFC 139 will take place in San Jose, Calif.

UFC brass today officially announced the card will take place in San Jose. Although a venue was not named, the card is expected to take place at HP Pavilion, a longtime home to sister promotion Strikeforce.

UFC 139 tales place Nov. 19. The event is expected to feature a heavyweight title fight between champion Cain Velasquez and top contender Junior Dos Santos.

Additionally, the promotion also announced Brazilians Rafael dos Anjos (15-5 MMA, 4-3 UFC) and Gleison Tibau (23-7 MMA, 9-5 UFC) will meet at the event.

The four bonus winners for UFC 130 were Gleison Tibau, Travis Browne, Jorge Santiago and Brian Stann.  Each received $70,000 for their efforts at the MGM Grand Garden Arena in Las Vegas.

Tibau won for submission of the night.  He closed a rear naked choke on Rafaello Oliveira in the second round, and it was the only submission of the evening.

Travis Browne scored the knockout of the night for blasting Stefan Struve late in the first round with a Superman punch in a highlight-reel finish.

Stann and Santiago each earned their bonus for the fight of the night, and it was the only other finish on the card.  Stann finished Santiago with ground strikes in the second round.